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Date: Sat, 13 Jun 2026 10:57:30 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>, Network Development
 <netdev@vger.kernel.org>, bpf <bpf@vger.kernel.org>, John Fastabend
 <john.fastabend@gmail.com>, Jakub Sitnicki <jakub@cloudflare.com>, Jiayuan
 Chen <jiayuan.chen@linux.dev>, Hemanth Malla <hemanthmalla@gmail.com>,
 zijianzhang@bytedance.com
Subject: Re: [RFC PATCH bpf-next 0/5] tcp: opportunistic loopback splice for
 BPF-paired sockets
Message-ID: <20260613105730.0ca1ca07@kernel.org>
In-Reply-To: <CAADnVQ+KTNKkf_Tc-RZR-g8wEfJU4qWcOPnjDbA2=PEtZsYnYg@mail.gmail.com>
References: <20260612011452.134466-1-xiyou.wangcong@gmail.com>
	<CAADnVQ+KTNKkf_Tc-RZR-g8wEfJU4qWcOPnjDbA2=PEtZsYnYg@mail.gmail.com>
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On Fri, 12 Jun 2026 09:01:43 -0700 Alexei Starovoitov wrote:
> Just saying that the code is free nowadays, so whether it's 1k lines
> or 10 lines is irrelevant for the discussion.
> 
> As far as the idea goes, I think, it would be interesting in pre-AI era,
> but today splice and friends are a prime target for bugs and more bugs.
> skmsg and tcp_bpf are reeling from unfixed bugs too,
> so my take is that we should not add any new features to skmsg
> and instead deprecate what is already there.

100% agreed. There are so many unfixed skmsg bugs it's hard to know
were to start :( Kernel "intelligence" to help unoptimized applications
is particularly unappealing right now.